package com.example.config;

import com.example.test.Resources;
import com.example.pojo.Configuration;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;


import java.beans.PropertyVetoException;
import java.io.InputStream;
import java.util.List;
import java.util.Properties;

public class XMLconfigBuilder {

    private Configuration configuration;

    public XMLconfigBuilder() {
        this.configuration = new Configuration();
    }

    // 用dom4j对配置文件输入流进行解析
    public Configuration parseConfig(InputStream in) throws DocumentException, PropertyVetoException {

        Document document = new SAXReader().read(in);
        Element rootElement = document.getRootElement();
        List<Element> list = rootElement.selectNodes("//property");
        Properties properties = new Properties();

        for (Element element:list ) {
            properties.setProperty(element.attributeValue("name"),element.attributeValue("value"));
        }

        //数据库对象
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setDriverClass(properties.getProperty("driverClass"));
        comboPooledDataSource.setJdbcUrl(properties.getProperty("jdbcUrl"));
        comboPooledDataSource.setUser(properties.getProperty("username"));
        comboPooledDataSource.setPassword(properties.getProperty("password"));

        configuration.setDataSource(comboPooledDataSource);

        //mapper.xml 解析
        List<Element> mapperList = rootElement.selectNodes("//mapper");
        for(Element element :mapperList){
            String mapperPath = element.attributeValue("resource");
            InputStream resourceAsStream = Resources.getResourceAsStream(mapperPath);

            XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(configuration);
            xmlMapperBuilder.parse(resourceAsStream);
        };


        return configuration;
    }
}
